You could hire an SEO expert, an advertising manager and an in-house videographer and hope you generate enough revenue to make up for their salaries. Or you could work with a marketing agency that has expertise in all three areas. An agency can quickly evaluate what’s working and what isn’t so you can shift gears more easily—for instance, redirecting some of your PPC spending to improve SEO and organic traffic.
11th point to me would be too look at your social media properties, work out how you can use them to assist your SEO strategy. I mean working on competitions via social channels to drive SEO benefit to your main site is great, working on re-doing your YouTube videos to assist the main site and also working on your content sharing strategy via these social sites back to the main site.